The Geologic setting of the John Day country
Subtitle: Grant County, Oregon
Publisher: United States Department of the Interior, Geological Survey
Published: 1969
Place of publication: S.ℓ.
Language: eng
Number of pages: 23
Subjects: Recreation areas; Geology
Other titles: John Day County.
Notes: Cover title.

"From material provided by Thomas P. Thayer."--P. 23.